Today, we have a tip from reader Rob R., who sent along a story from Murfreesboro, Tenn. about a gold SUV which left a 22-year-old cyclist with life-threatening injuries. Police there released "graphic video" of the incident hoping it leads to an arrest.

The video from red light cameras shows the SUV plowing into the back of the bicycle. The driver then leaves the cyclist, Donald Faulkner, in the road bleeding.

"I don't see how they could not know. I don't know how you can hit a cyclist on a bicycle and not know they'd been hit," said Adkison.

The video shows the driver of the SUV never slows and drives away as though nothing happened. Faulkner was taken by emergency medical helicopter to Vanderbilt Medical Center where he remains stable in intensive care.